ADELOTOPUS JACOBSONI. 255 
the genus Cryptocephalomorpha and not to the genus Ade- 
lotopus. 
The new species belongs undoubtedly to the genus Ade- 
lotopus: the head is declivous and the labrum is visible 
when the head is seen in front. One of the characteristics 
of the genus Cryptocephalomorpha is that the labrum is 
not visible but hidden under the head. 
I propose to call the new species 
Adelotopus Jacobsoni. 
Length 6'/, mm., greatest breadth 2°/, mm. — Subparallel, 
regularly narrowed in slightly curved lines towards the 
end which is broadly truncated. Very shining, impunctate, 
except a short row of a few (6) distinct punctures on the 
elytra between the shoulder and the lateral margin, and a 
very minute spare punctuation on the femora and on the 
sides of the ventral segments. Above pitchy black, the 
apical fourth of the elytra brown red, the line of demar- 
cation between the two colours nearly straight but not 
sharply defined; beneath, with the antennae and legs, 
brown red, the head and prosternum, however, dark pitchy. 
Head broad, arched, the labrum visible in front. 
Prothorax at the base but very little broader than the 
elytra, slightly narrowing in faintly curved lines towards 
the front margin; the sides flattened, the anterior lateral 
angles acutely protruding, embracing the sides of the head ; 
the front margin between the protruding angles straight; 
the basal margin straight, the lateral angles subangular. 
Scutellum not visible. 
Elytra at the base but very little narrower than the 
base of the prothorax, visibly narrowing in nearly straight 
lines towards the apex where they are broadly and con- 
jointly truncated; the truncation of each elytron very 
slightly emarginate which gives the entire truncation a 
somewhat waved appearance; the sutural angles are nar- 
rowly rounded, the lateral ones very obtusely so; the lateral 
margins of the elytra are very narrowly flattened and have 
Notes from the Leyden Museum, Vol. XX XI. 
